Automatically-closing valve.



E. BEGH. AUTOMATICALLY CLOSING VALVE, APPLIOATIOIf mum SEPT. 1a, 1907.

914,547. Patented Mar. 9, 1909.

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EDUARD BECH, OF COPENHAGEN, DENMARK.

AUTOMATICALLY-CLOSING VALVE.

Specification of Letters Patent. Patented March 9, 1909.

1907. Serial No. 393,144.

Application filed September 16,

of tube 0 are received within the central bore in, of the cylindrical lower part of supplemental casing b. This tube is provided with To all whom it Be it known of the Kingdom of Denmark,

may concern: that I, EDUARD BECH, cltizen residlng at I-Iyshenstrade 16, Copenhagen, Denmark, two fixed collars f and g, which receive ehave invented certain new and useful tween them the annular inward flange 6 of a Improvements in Automatically Closing valve-opening nut d having at its upper end a milled integral grasping disk Z for convenience of turning and retention. The interior of this nut is provided with a helical groove r, fitting a corresponding helical rib r of the exterior of supplemental casing 19, said groove and rib constituting a screwthreaded connection between these two parts, of such pit-ca that when left free the said nut will slowly descend under the action of gravity. To open the valve, the said nut is screwed to the right and held in its highest position by the hand of the operator.

To permit the valve to close, the operator releases the disk Z, and the weight of parts a, (Z, s, h, 2', 70 causes them to automatically descend together. This descent is retarded by the spiral rib r and spiral groove r, so that the valve h reaches its seat gradually and without shock. As the upper air-cushion a prevents any sudden or rapid upward movement of the valve whether accidental or intentional and as the nut cl supporting said valve through tube 0 is limited in the speed of its upward and downward movements by the screw-threaded connection above described, it follows that all movements of said valve must be gentle and Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to self closing water cocks or valves and is especially intended. to prevent jar or shock in their closing. T 0 this end I make a screw-threaded connection between a part which moves up and down with said valve and a fixed casing, the pitch of the screw-threads being such that the weight of the valve when released will automatically cause the said. part to descend following the path of said threads and delayed thereby, the said valve sharing in this delay and reaching its seat gradually and lightly without shock.

The accompanying drawing represents a valve and appurtenances embodying my invention, partly in vertical section and partly in side elevation.

The main casing of the valve is designated a and has the form of a vertical cylinder rounded at the top and having a lateral tubular branch which is internally screw-threaded and constitutes a liquid inlet a The lower end of this casing is open and eXternoiseless. Its only normal automatic action nally screw threaded engaging similar is the descent for closure above explained. threads of a supplemental downwardly eX- Having thus described my mvention what I claim as new and desire to secure ters Patent is:

1. In combination with a valve adapted to move vertically, a nut and intermediate parts supporting said valve, said nut engaging a fixed part by screw-threads of such a pitch that gravity will cause the descent of said valve and nut, retarded by said screwthreads on the release of said nut for the purpose set forth.

2. In combination with a valve adapted to move vertically, a discharge tube supporting said valve, a nut engaging said tube, and a fixed casing having a helical rib and groove connection with said nut, in order that the latter may lift the valve when turned in one direction by hand, but when released will descend by gravity, and in so doing turn on said casing following the line of said rib and groove and thus retarding the descent of the tending casmg b, the upper part of which by Letis enlarged and provided around the central bore with a raised annular valve seat 23 for cylindrical valve h, having an upwardly eX- tending stem i, on the upper end of which is a disk 7c fitting the interior of main cylinder a above said inlet. The space between the upper end of casing a and said disk constitutes an air-cushion n for the latter, so that the upward movement of the valve may cause no shock. The general operation of this valve is old and well-known. This valve has an integral downward extension 8, preferably in the form of a cone terminating in a short broad cylindrical stud resting on an upwardly presented, approximately cupform stud or block 10 integral with the upper end of vertical outlet tube 0, said upper end having openings 0 surrounding the base of block w. The said part 5 and upper end valve to prevent shock substantially as set playtoeflect the same but moving with said forth. tuberandinut ,in'theqlatter part of its descent 3. In combination with an automatically and a plunger rising and falling with said opening and closing valve, a;nut;:arra-nged,to valve zund-er f'llhQfiGtlOIl of the fluid supply lift the same from its seat and to descend and of gravity substantially as set forth. automatically inn der the inflnenceiof gravity .In,,testi 1nony whereof, I have :signed any permitting the closing of said valve; name to this specification in the presence of i 4:. In combination with a fixed part 'havtwo subscribing witnesses. i11 spiral ribs a nut en 'a 'in said ribs and adapted :to descend by? Z ra vity automat- EDUABD BECH' icailly and gradually along the said ribs, an Vl ltnesses: outlettube descending with said nut, a-v-alve PEDERSEN, closing'said outlet tube and :havinga limited I GHARLES WVIBLIAMS. 

